syzkaller login: [ 30.622912] BUG: Bad rss-counter state mm:00000000e8d98865 type:MM_FILEPAGES val:33 [ 30.624405] BUG: Bad rss-counter state mm:00000000e8d98865 type:MM_ANONPAGES val:22 [ 30.766681] ================================================================== [ 30.767550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.768427] Read of size 8 at addr ffff88800e369228 by task sshd/221 [ 30.769151] [ 30.769358] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.770433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.771442] Call Trace: [ 30.771747] [ 30.772017] dump_stack_lvl+0x91/0xf0 [ 30.772484] print_report+0xcc/0x620 [ 30.772940] ? __virt_addr_valid+0x102/0x340 [ 30.773460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774046] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774631] kasan_report+0xbe/0xf0 [ 30.775101] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775744] vma_interval_tree_remove+0xc75/0xec0 [ 30.776373] vma_prepare+0xc54/0x11a0 [ 30.776867] __split_vma+0x5af/0x950 [ 30.777339] ? __pfx___split_vma+0x10/0x10 [ 30.777875] ? find_held_lock+0x2c/0x110 [ 30.778409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778973] ? lock_is_held_type+0x9f/0x120 [ 30.779521] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.780143] ? mtree_range_walk+0x632/0x900 [ 30.780716] ? mas_walk+0x5c7/0x7c0 [ 30.781193] do_vmi_munmap+0x1f1/0x2b0 [ 30.781681] mmap_region+0x1f9/0x2660 [ 30.782168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.782699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.783411] ? __pfx_lock_acquire+0x10/0x10 [ 30.783938] ? __pfx_mmap_region+0x10/0x10 [ 30.784478] ? security_mmap_addr+0x7d/0xa0 [ 30.785006] ? get_unmapped_area+0x1f5/0x3f0 [ 30.785561] do_mmap+0x854/0xf00 [ 30.785997] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.786511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.787089] ksys_mmap_pgoff+0x3af/0x500 [ 30.787621] do_syscall_64+0x3f/0x90 [ 30.788131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788809] RIP: 0033:0x7f661a1bcd82 [ 30.789289] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.791555] RSP: 002b:00007ffd79914718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.792513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f661a1bcd82 [ 30.793405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66195f6000 [ 30.794319] RBP: 00007f66195f6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.795205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055900241eec0 [ 30.796093] R13: 00007ffd79914730 R14: 00007ffd79914760 R15: 00007ffd79914ac0 [ 30.796989] [ 30.797301] [ 30.797523] Allocated by task 214: [ 30.797975] kasan_save_stack+0x22/0x50 [ 30.798522] kasan_set_track+0x25/0x30 [ 30.799037] __kasan_slab_alloc+0x59/0x70 [ 30.799583] kmem_cache_alloc+0x16b/0x370 [ 30.800127] vm_area_dup+0x20/0x160 [ 30.800605] __split_vma+0x170/0x950 [ 30.801095] split_vma+0xc6/0x110 [ 30.801559] mprotect_fixup+0x8d2/0xb30 [ 30.802089] do_mprotect_pkey+0x87e/0xd40 [ 30.802651] __x64_sys_mprotect+0x78/0xc0 [ 30.803207] do_syscall_64+0x3f/0x90 [ 30.803712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804386] [ 30.804606] Freed by task 214: [ 30.805022] kasan_save_stack+0x22/0x50 [ 30.805555] kasan_set_track+0x25/0x30 [ 30.806077] kasan_save_free_info+0x2b/0x50 [ 30.806652] __kasan_slab_free+0x10a/0x190 [ 30.807218] kmem_cache_free+0x10d/0x4d0 [ 30.807747] rcu_core+0x8c8/0x2860 [ 30.808212] __do_softirq+0x1b7/0x7d4 [ 30.808719] [ 30.808945] Last potentially related work creation: [ 30.809562] kasan_save_stack+0x22/0x50 [ 30.810088] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811423] remove_vma+0x139/0x170 [ 30.811901] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812488] do_vmi_munmap+0x1f1/0x2b0 [ 30.812994] __vm_munmap+0x138/0x3a0 [ 30.813478] __x64_sys_munmap+0x59/0x80 [ 30.813992] do_syscall_64+0x3f/0x90 [ 30.814511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815197] [ 30.815421] The buggy address belongs to the object at ffff88800e3691d0 [ 30.815421] which belongs to the cache vm_area_struct of size 168 [ 30.816987] The buggy address is located 88 bytes inside of [ 30.816987] freed 168-byte region [ffff88800e3691d0, ffff88800e369278) [ 30.818548] [ 30.818775] The buggy address belongs to the physical page: [ 30.819441] page:000000006b284ec2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe369 [ 30.820522] memcg:ffff888009b05a01 [ 30.820947] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.821592] page_type: 0xffffffff() [ 30.822036] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.822978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b05a01 [ 30.823875] page dumped because: kasan: bad access detected [ 30.824526] [ 30.824739] Memory state around the buggy address: [ 30.825312] ffff88800e369100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.826167] ffff88800e369180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.827021] >ffff88800e369200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.827875] ^ [ 30.828423] ffff88800e369280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.829272] ffff88800e369300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.830114] ================================================================== [ 30.831095] Disabling lock debugging due to kernel taint [ 33.569428] BUG: Bad rss-counter state mm:00000000091ebade type:MM_FILEPAGES val:33 [ 33.570523] BUG: Bad rss-counter state mm:00000000091ebade type:MM_ANONPAGES val:22 [ 34.026148] BUG: Bad rss-counter state mm:00000000ae993baa type:MM_FILEPAGES val:33 [ 34.027339] BUG: Bad rss-counter state mm:00000000ae993baa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59675' (ECDSA) to the list of known hosts. 2023/06/21 03:40:43 fuzzer started 2023/06/21 03:40:43 dialing manager at localhost:36067 2023/06/21 03:40:43 checking machine... 2023/06/21 03:40:43 checking revisions... [ 34.707807] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:40:43 testing simple program... [ 34.753420] cgroup: Unknown subsys name 'net' [ 34.799377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:43 Registers: info registers vcpu 0 RAX=ffff888017c90001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888017c8f901 RSI=ffff888017c8f9e8 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff86113462 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001a937 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888017c8f9f0 R15=ffff88806ce09a98 RIP=ffffffff811304d5 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faaa2098900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe301fb000 CR3=000000000e842000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f807cbf1000 CR3=000000000c7ee000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2032343a30343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000